Fix Complex Patterns Category

[bbenetskyy]

In Playground App we have hidden Complex Patterns category with not supported for a moment CSS Code.

After #95 will be merged we should go and provide proper changes for gradients in Complex Patterns Category and add it into Playground database at Matadata.json and insert with name and slug into Categories.json file.

[mgierlasinski]

@bbenetskyy Without #95 you should be able to fix Gradient Parser for background-size in CSS, now we have:

{
    "slug": "b79936eb-215b-4d46-801d-800e7057bf3e",
    "stylesheet": "repeating-radial-gradient(...)52px 52px", // this is bad
    "tags": [ "complexpatterns" ]
  },

change to:

{
    "slug": "b79936eb-215b-4d46-801d-800e7057bf3e",
    "stylesheet": "repeating-radial-gradient(...)",
    "size": "52px 52px",
    "tags": [ "complexpatterns" ]
  },

Later, when we have #95, we can read "size".

[mgierlasinski]

@bbenetskyy Are there still issues with rendering after latest updates?

[bbenetskyy]

In the latest Playground DB this looks fine